Recording-thermometer



` (No Modem ,Y y A.. WALTHBR-. RECORDING THERMDMEVTER. r No; 511,258., V Patented 1360,19, 189s.

1, zum Imm A "www Y' UNITED. STATES ADLF VVALTHER, OF ST. LOUIS, MISSUR.

RECORDING-THERMOMETER.

. SPECIFICATION forming part of Letters .Patent No. 511,258, dated December 19, 1893.

Application iiled June 25,1892., Serial No. 438,006. (No modell) To all whom t may concern/ Beit known that I, ADOLF WaLrHEa of St. Louis, Missouri, have made a new and useful Improvement in Recording-Thermometers, of which the following is a full, clear, and exact description.

The improvement under consideration has to do with the temperature within the mashtub or vat during the mashing` of the malt. The quality of a brew of beer depends, among other things, upon the temperatures at which ZCI the brewing occurs, so much so that a variation of even a very few degrees, and for a brief period only, changes the character of the brew, and accordingly it is essential not only that the brewing shall be initiated at the proper temperature but also that it shall be carried on at the proper, dilferent, temperatures until the operation is completed. A common practice has been to employ thermometers of ordinary construction whereby the temperatures of the mash-tub can be noted from time to time during the brewing; but

to enable the temperatures to be more ac-` curately determined, and variations in temperature more readily noted, and further to enable a record to be kept of the temperatures throughout the brewing operation, are the objects of the present improvement which consists in a bulb or equivalent construction containing a fluid such as ether, sensitive to heat and which promptly expands and contracts as the temperature varies, and adaptable for use within a mash-tub, in combination with'a prt-issure-reoordingl gage substantially as is hereinafter set forth and claimed, aided by the annexed drawings, making part ofrthis specification, in which-#- Figure 1 is a view in perspective of a vat Such as is used in brewing, a portion of the supplemented by the im provement under consideration. The recording gage, B, is also substantially of the usual construction. i

f C represents the bulb. It may be arranged either within the interior, a, o`f the vat, substantially as shown, or it may be otherwise located so long as it is exposed to the temperature prevailingwithin the Vat. Its shape also may vary. Vha; is considered a desirable forln is' exhibited; namely, a thin copper tube, c, closed at its ends by the heads, c',

c2, and the heads preferably connected by means of the tie-rods'c3. A tube, c4, serves to establish connection between the interior of the bulb and the gage, the head, c2, being perfol-ated to admit the tube which leads thence through the shelha', of the vat, and connecting with the gage preferably at the point, b,

at which the pressure is usually introducedy into such a gage. In practice the tube c4, is suiiiciently pliable to enable that part of it which is Within the vat, to be bent to enable the bulb to be arranged near the side of the vat, and out of the Way of the stirrers, a2, substantially as shown. Any suitable means not shown may serve to support the bulb in position.

To aord means of supporting the gage there is 'secured on the outside of the vat in any suitable way, as by soldering, or otherwise, a knob, or shoulder a2, through which the tube c4, passes, and into the hollowed portion a3, of this the projection c5, on the collar c6, enters. rlhis collar or clamping piece is tted fast on the tube c4, and is fastened to the knob c2, by means of bolts and nuts as shown.

The operation of the improved mechanism is as follows: The brewingis carried on in the usual way within the vat; meanwhile the strip, b', withinA the gage, upon which the rec- 0rd is made, is moved past the recording pencil, b2, in the ordinary manner; the temperature within the vat causes the ether within the bulb to gasify and expand or contract as the case may be; the pressures corresponding to such expansions and contractions are noted upon any convenient part, such for instance as the upright bar, b3, in the gage 5 the strip b', is ruled horizontally in the usual manner to enable the pressures to be readily ascer tainedthe marking upon the bar corresponding to'thepositions of the lines b4; the usual time-marksY b5, (also appear upon thestrip. The line, 66, traced upon the strip in this way 5 thusindicates the pressures, and consequently the temperatures, prevailing Within the vat from the beginning to the end of the brew, and the inspector, after; theoperation has ceased, obtains a record thereof. The recordro ing strip, b', Within the gage, may be pref pared for Work such as is under consideration by having the temperatures corresponding to the horizontal lines, b4, upon the strip marked directlythereon, substantially as isindicated I5 at N, Fig. 3,` in which View the numbers 47,'

52, k85o., respectively are the temperatures (Fahrenheit, Reauxnur, dsc as the case may be) corresponding Lto the lines, or said temperaturesma-y be marked upon the barlior zo the temperaturemarkingsmay be upon both the'stripfand the bar, as in Fig. 3. Thetirnemarks, b5, divide Lthe stri p vertically into sections belonging respectively tothe hours in* dicated, and thus the record shows yalso lthe 25 periods `when the various temperatures ref spectively obtained. v

The present improvement, in its application, is not restricted tofbrewing apparatus exclusively, as it can, and for a similar or 3oL analogous purpose, be used in connection with distilling, sugar-makingor other apparatus, having chambers in which it is desirable to keep an accurate Vrecord of the" temperature prevailing therein.

t It is not always essential to use'in the bulb a iiuid which gasities before it exerts'a pressure upon the recording gage- I claiml. In arecording apparatuathe combination With a gage anda tube secured thereto, iexibleat the outer end, of the bulb having heads at each end 'secured by the rods, the flexible portion of the tube entering one bead,

whereby the bulb can be placedv in any desired position when inV use inside a brewing vat, substantially as described.

as n

2. In combination with a brewing vat, a re-y cated at an suitable point Within the vat, all

substantielJ y as described. f

Witness my liand'this 21st day of June, 1892.

ADOLF VALTHER.

Witnesses:

. HERM C. STIFEL,

C. D. MOODY. 

